/*
 * Copyright (C) 2019 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package androidx.test.filters;

import androidx.annotation.RestrictTo;
import androidx.annotation.RestrictTo.Scope;
import java.util.regex.Pattern;
import org.junit.runner.Description;

/**
 * A JUnit filter for filtering tests whose name match one of the given regular expression.
 *
 * @hide
 */
@RestrictTo(Scope.LIBRARY)
public final class TestsRegExFilter extends AbstractFilter {

  private Pattern pattern = null;

  /** Sets the regex pattern to use */
  public void setPattern(String patternString) {
    this.pattern = Pattern.compile(patternString);
  }

  @Override
  protected boolean evaluateTest(Description description) {
    if (pattern == null) {
      return true;
    }
    String testName =
        String.format("%s#%s", description.getClassName(), description.getMethodName());
    return pattern.matcher(testName).find();
  }

  @Override
  public String describe() {
    return "tests filter";
  }
}
